<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板</title>
    <style>
        .container {
            width: 350px;
            height: 300px;
            margin: 0 auto;
            /*水平方向居中*/
            /* border: 1px black solid; */
            text-align: center;
        }

        .grey {
            color: grey;
        }

        .container .row {
            width: 350px;
            height: 40px;

            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .container .row input {
            width: 260px;
            height: 30px;
        }

        #submit {
            width: 350px;
            height: 40px;
            background-color: orange;
            color: white;
            border: none;
            margin: 10px;
            border-radius: 5px;
            font-size: 20px;
        }
    </style>
</head>

<body>
<div class="container">
    <h1>留言板</h1>
    <p class="grey">输入后点击提交, 会将信息显示下方空白处</p>
    <div class="row">
        <span>谁:</span> <input type="text" name="" id="from">
    </div>
    <div class="row">
        <span>对谁:</span> <input type="text" name="" id="to">
    </div>
    <div class="row">
        <span>说什么:</span> <input type="text" name="" id="say">
    </div>
    <input type="button" value="提交" id="submit" onclick="submit()">
    <!-- <div>A 对 B 说: hello</div> -->
</div>

<script src="js/jquery-3.7.1.min.js"></script>
<script>

    $.ajax({
        type: "get",
        url: "/message/getList",
        success: function (message) {
            for (let msg of message) {
                let html = "<div>" + msg.from + " 对 " + msg.to + " 说 " + msg.message + "</div>";

                $(".container").append(html);
            }
        }
    })

    // 给点击按钮注册点击事件
    function submit() {
        // 1. 获取到编辑框内容
        let from = $("#from").val();
        let to = $("#to").val();
        let say = $("#say").val();

        if (from == "" || to == "" || say == "") {
            alert("请检查输入内容");
            return;
        }
        // 检验完成，发起请求
        $.ajax({
            url: "/message/publish",
            type: "post",
            contentType: "application/json",
            data: JSON.stringify({
                from: from,
                to: to,
                message: say
            }),
            success: function (result) {
                if (result.ok == 1) {
                    // 成功
                    alert("添加成功");
                    let html = "<div>" + from + " 对 " + to + " 说 " + say + "</div>";

                    $(".container").append(html);
                    $(":text").val("");

                } else {
                    // 失败
                    alert("添加失败");
                }
            }
        });
    }

</script>
</body>

</html>